Strimzi

Strimzi Producer API

Endpoints for producing (sending) messages to Kafka topics via HTTP. Supports JSON and binary message formats.

Documentation GitHub OpenAPI

Operations 2

POST /topics/{topicname} Send Messages to Topic #

POST /topics/{topicname}/partitions/{partitionid} Send Messages to Partition #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Strimzi Kafka Bridge REST Consumer Producer API
  description: The Strimzi Kafka Bridge provides an HTTP/REST interface to Apache Kafka. It allows HTTP clients to produce and consume messages, manage consumer group subscriptions, and query topic metadata without needing a native Kafka client library. The Bridge acts as a protocol translator between HTTP and the Kafka protocol. Deploy via the KafkaBridge custom resource.
  version: 0.28.0
  contact:
    name: Strimzi Community
    url: https://strimzi.io
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://localhost:8080
  description: Kafka Bridge (default local port)
tags:
- name: Producer
  description: Endpoints for producing (sending) messages to Kafka topics via HTTP. Supports JSON and binary message formats.
paths:
  /topics/{topicname}:
    post:
      operationId: send
      summary: Send Messages to Topic
      description: Sends one or more messages to a Kafka topic. Messages can include a key, value, partition, headers, and timestamp. Supports JSON-encoded Kafka records.
      tags:
      - Producer
      parameters:
      - name: topicname
        in: path
        required: true
        description: The name of the Kafka topic to send messages to
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/vnd.kafka.json.v2+json:
            schema:
              $ref: '#/components/schemas/ProducerRecordList'
      responses:
        '200':
          description: Messages sent successfully
          content:
            application/vnd.kafka.v2+json:
              schema:
                $ref: '#/components/schemas/OffsetRecordSentList'
        '404':
          $ref: '#/components/responses/TopicNotFound'
        '422':
          $ref: '#/components/responses/UnprocessableEntity'
  /topics/{topicname}/partitions/{partitionid}:
    post:
      operationId: sendToPartition
      summary: Send Messages to Partition
      description: Sends one or more messages to a specific partition of a Kafka topic.
      tags:
      - Producer
      parameters:
      - name: topicname
        in: path
        required: true
        description: The name of the Kafka topic
        schema:
          type: string
      - name: partitionid
        in: path
        required: true
        description: The partition ID to send messages to
        schema:
          type: integer
      requestBody:
        required: true
        content:
          application/vnd.kafka.json.v2+json:
            schema:
              $ref: '#/components/schemas/ProducerRecordList'
      responses:
        '200':
          description: Messages sent successfully
          content:
            application/vnd.kafka.v2+json:
              schema:
                $ref: '#/components/schemas/OffsetRecordSentList'
        '404':
          $ref: '#/components/responses/TopicNotFound'
components:
  responses:
    TopicNotFound:
      description: Topic not found
      content:
        application/vnd.kafka.v2+json:
          schema:
            $ref: '#/components/schemas/Error'
    UnprocessableEntity:
      description: Unprocessable entity
      content:
        application/vnd.kafka.v2+json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    OffsetRecordSentList:
      type: object
      properties:
        offsets:
          type: array
          items:
            $ref: '#/components/schemas/OffsetRecordSent'
    ProducerRecordList:
      type: object
      properties:
        records:
          type: array
          description: List of records to produce
          items:
            $ref: '#/components/schemas/ProducerRecord'
    Error:
      type: object
      properties:
        error_code:
          type: integer
          description: The error code
        message:
          type: string
          description: A human-readable error message
    ProducerRecord:
      type: object
      properties:
        key:
          description: The message key (optional)
        value:
          description: The message value (required)
        partition:
          type: integer
          description: The target partition (optional — if not set, uses partitioner)
        headers:
          type: object
          additionalProperties:
            type: string
          description: Optional message headers
        timestamp:
          type: integer
          description: Message timestamp in milliseconds since epoch
    OffsetRecordSent:
      type: object
      properties:
        partition:
          type: integer
          description: The partition the message was sent to
        offset:
          type: integer
          description: The offset of the produced message
        error_code:
          type: integer
          nullable: true
          description: Error code if the record failed
        error:
          type: string
          nullable: true
          description: Error message if the record failed
externalDocs:
  description: Strimzi Kafka Bridge Documentation
  url: https://strimzi.io/docs/bridge/latest/